Sleeve for roller bearings



Jan. 15, 1929.

B. A. GAYMAN sLEEvE Fon ROLLER B11/muws en( JZ @9722625729 f PatentedJan. 15, UNITED STATES Bnl' GAYIAN, OF SAN MATEO, CALIFORNIA, ASSIGNOR'T0 LINK-BELT. COMPANY,l

PATENT OFFICE.

DI CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SLEEVE FOR ROLLER BEARINGS.

Application nled December 6, 1926. Serial No. 152,744.

My invention relates to an improvement rin mountin double roller`bearings upon a shaft over t e methods now in vogue, which in generalfall into two distinct types as follows:

First,-the shaft is carefully finished at considerable expense byturning or grinding to very accurate dimensions to fit the standardanti-friction bearing. It is impossible to use this method for mountinganti-friction bearings on commercial shafting because commercialshafting varies consider- 'ably in diameter and a standard bearing wouldbe either too small to be applied or too loose to t shafting asordinarily offered the trade.

Second,the anti-friction bearings are mounted on a sleeve whose insidediameter is sucientl greater than the outside diameter of t e largestvariation rin the diameter of commercial shafting so that. the sleevecan be slip ed over it. The projectin ends ,of this s eeve are thenclamped or ot erwise fastened to the shaft. The clearance between thesleeve and the shaft, particularly when the shaft is undersize, may besuicient to causethe failure of the sleeve from deflection orcrystallization because the sleeve is anchored to the shaft outside thebearing and the load has to be transferred through the sleeve.

In carryingeout my invention I pro ose to interpose tween the inner raceof oth of the bearin s and the shaft a sleeve having a tape surface, theinner peri hery of the inner race having'also a tape face conforming tothe ta red surface on the sleeve. The inside iameter of this sleeve issuiciently large to pass over commercial size shafting and by drawing itthrough the tapered race the sleeve is made to clamp the shaft rigidlywith the result that there is a continuous mass of metal interposedbetween the shaft and the race, the parts being all rigidlyhe1d`together. Thus there is a direct contact and a direct transfer ofthe load from the shaft throu h the sleeve to the race. Otherobjectswill appear from time to time throughout the specification andclaim.

My invention is illustrated more or less diagrammatically in theaccompanying drawings, wherein- Figuretjris a section on a planeparallel with the axis of the shaft;

sneeuw Figure 2 is a detail side elevation of one of the sleeves;

Figure 3 is a section along the Aline 3-'3 of Figure 2;

Figure 4 is a section along the line 4 4 of Figure 1.

Like parts are indicated by like characters throughout the specificationand drawings.

A is the shaft, A1 is the lower portion of a pillow block, A2 the capheld in place by bolts A. The pillow block has an interior sphericalsurface A* in which the filler sleeve A5 is permitted a certain amountof movement to prevent bindin of the shaft and bearing. The innerperiphery of this sleeve A5 is cylindrical and always in line with theshaft.

B B1 are. expanding sleeves slotted at B2 and B12 with their outer endsthreaded at Bs. The interior portion of each sleeve is cylindrical andconforms generally in diameter to the diameter of the shaft. The slottedportion of the sleeve has an outwardly inclined or tapered surface `B.`These slots B2 B12 are staggered so that both the thread-- ed and thetapered portion is slotted and since these slots overlap a very largedegree of constriction of the sleeve is permitted.' A portion of eachsleeve has an extension B extending beyond the lar st'diameter of thetapered portion so that t e outer portion of each sleeve interlocks witha portion ofthe other whereby the relative rotation of the two sleevesis prevented. B B are vinner' roller bearing races `having taperedsurface B'I to conform to and en ge the tapered surface on the sleeve. Bare roller members located between the inner races B" and outer 'racesB", these outer racesbeing in engagement with the cylindrical portionofthe sleeve A,

Associated with the outer ends of each of the sleeves B B1, are clampingnuts C.

These clam ingl nuts surroundthe shaft and 4 are interior y; readed toengage the threaded portion on the sleeve.

When these nuts are rotated with r t to the sleeves `they enga the sides,o the inner roller races and raw the sleeve down the inclined portionof the inner ,roller races, thereby constricting the Vslotted portion ofthe sleeve and clamping the racel and sleeve rigidly in position'on theshaft. The. fact that the two sleeves interlock makes it possible toprevent the turnng'of the sleeve with the nut, and thus preventing thescrewing of the nut into its position on the sleeve.

@l 1s a set screw whereby the sleeve may be locked on the shaft toprevent rotation after it has been tightened up. C2 C2 are filler ringsclosing the open end of the sleeve AJ. They have oil channels C3 inWorking engagement with the outer periphery of the clamp nut, to sealthe lubricant in the hearing, and cylindrical spacer means CL engagx ingthe outer ends otl the roller races to position them in the sleeve. Capscrews C5 are provided to hold these filler rings in place and shinis Care used to prevent forcing the liller rings too far in and binding thebearings.

GbViously but a single sleeve and bearing could be used it it weredesired to use but a single hearing and equally obvious ball hearings orplain cylindrical bearings in stead of tapered hearings might be used,it being only necessary to modify any of these types of bearings byproviding a ta pered inner surface on the inner race to enf' gage thetapered surface on the split sleeve.

lar rings adapted to encircle a shaft, each ring having a centralexteriorly tapered portion and a cylindrically threaded portion beyondthe reduced end ot the tapered portion, each ring also having asemi-circular cylindrical portion projecting beyond the large end of thetapered portion whereby the two semi-circular cylindrical portions mayinterlock to hold the rings against relative rotation, slots extendingthrough the tapered portion of each ring to the threaded cylindricalportion alternately with slots extending through the threadedcylindrical portion into the tapered portion, a pair of interiorlytapered anti-friction bearing races adapted to engage, one to engage thetapered portion of each ont the sleeves, collars in threaded engagement'with the threaded por tion of the sleeves adapted to abut against theouter edges oit' the anti-friction bearing races to longitudinallydisplace the sleeves with respect to the hearing races to clamp thesleevesand races in position on the shaft.

Signed at San Francisco, county of San Francisco and State otCalifornia, this 24th day of November, 1926.

BERT A. GAYMAN.

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